Efforts to reduce greenhouse emissions and carbon footprint create new challenges for the operation of gas turbine engines. As the operating conditions become more severe, new materials and coatings are being developed to maintain uptime and prevent unexpected outages.
Overview
As we move to reduce greenhouse emissions and carbon footprints, REACH regulations will impact traditional corrosion coatings as hexavalent chromium is removed. This means sustainable fuels like hydrogen are utilized at higher operating temperatures to reduce emissions and increase efficiency. As the operating conditions become more severe, new chrome-free materials, slurries and coatings are being developed. We will walk you through the process to gain a basic understanding of the materials used for hot corrosion application, how to prevent oxidation, the methods of aluminizing, and how to extend the life between overhaul periods.
We walk through the process of air entering the fan section of gas turbines and how when it becomes compressed, the temperature increases as it moves through the turbine sections. While state-of-the-art materials are typically used, even these require additional help combat corrosion, oxidation, and ever-increasing surface temperatures. We will share how we can assist in the process with Linde AMT offerings as well as highlight overall customer needs based on REACH, sustainable fuels, and component operations under higher temperatures. We will also share some of our new tools to meet new customer needs.
Key Takeaways
- Learn how our chrome-free slurries and coating applications for hot corrosion will work in gas turbine engines
- Understand how our surface enhancements prevent oxidation and the various methods of aluminizing and other materials
- Learn how our thermal barrier coatings (TBCs) will extend life between overhaul periods including bond coats and TBC topcoats
Speakers
Molly O’Connor is an Expert Scientist in the Advanced Materials Research and Development group at Praxair Surface Technologies with a focus on the development of new materials chemistries and coatings for use in hot and harsh environments. She received her BS in metallurgical and materials engineering from Illinois Institute of Technology and a PhD in materials from University of California, Santa Barbara. In addition to her work at Praxair, she also worked as a materials scientist at GE Research and as a faculty member at both Texas A&M University and Stony Brook University. She has over 20 publications in peer reviewed journals and has been awarded 16 patents in coatings for turbine engines. Molly O’Connor currently sits on the executive board of the ASM International, Thermal Spray Society Board of Directors.
Mark Perpall is a Senior R&D Chemist in the SermeTel division at Linde Advanced Material Technologies in Indianapolis. He has worked in the development of high-performance aerospace coatings for 15 years, first in aircraft exteriors at Hentzen Coatings, and most recently in the area of airframes and turbomachinery at Linde AMT. He is responsible for the design, testing and implementation of the next generation hexavalent chromium-free slurry coating systems that provides both excellent performance, and environmental, health and safety benefits to the industry. He earned his doctorate in organic polymer chemistry from Clemson University in 2007.
Tang is Linde Advanced Material technologies R&D Associate Director of Materials, and has over 10 years’ experience in development of advanced metallic coatings for high-temperature oxidation and corrosion protection. He has 7 patents related to novel high-temperature coating and processes.